Physical Properties of CaFe$_{4}$As$_{3}$ Single Crystals

ORAL

Abstract

New compound CaFe$_{4}$As$_{3}$ crystallizes in an orthorhombic structure with Fe$_{2}$As$_{2}$ layers aligned along $b$ direction but a rectangular cross-section in \textit{ac} plane. The needle-shaped CaFe$_{4}$As$_{3}$ single crystals were grown and are found to undergo two successive phase transitions occurring at T$_{1} \sim $ 90 K and T$_{2} \sim $ 27 K, respectively. At T$_{1}$ the electrical resistivity increases and magnetic susceptibility decreases in both parallel and perpendicular to $b$ directions consistent with the scenario of spin-density-wave formation. At T$_{2}$, resistivity decreases sharply at T$_{2}$ with hysteresis while magnetic susceptibility increases along either $b$ direction or \textit{ac} plane. The underlying physics will be discussed by taking into account other physical properties.

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Authors

  • Amar Karki

    • Louisiana State University, USA
    • Louisiana State University

  • Yimin Xiong

    • Louisiana State University, USA
    • Louisiana State University

  • Jianneng Li

    • Louisiana State University

  • Shane Stadler

    • Department of Physics and Astronomy, Louisiana State University
    • Louisiana State University, USA
    • Louisiana State University

  • Gregory McCandless

    • Department of Chemistry, Louisiana State University
    • Louisiana State University

  • Julia Chan

    • Louisiana State University, USA
    • Louisiana State University

  • Rongying Jin

    • Louisiana State University
    • Louisiana State University, Baton Rouge, LA 70803, USA
    • Department of Physics and Astronomy, Louisiana State University
    • Louisiana State University, Baton Rouge LA
    • Louisiana State University, USA
    • Dept. of Physics, Louisiana State University, Baton Rouge, LA 70802, USA